CVE-2021-47061
KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
If allocating a new instance of an I/O bus fails when unregistering a
device, wait to destroy the device until after all readers are guaranteed
to see the new null bus. Destroying devices before the bus is nullified
could lead to use-after-free since readers expect the devices on their
reference of the bus to remain valid.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: Destruye los dispositivos del bus de E/S al cancelar el registro _después_ de sincronizar SRCU Si falla la asignación de una nueva instancia de un bus de E/S al cancelar el registro de un dispositivo, espere para destruir el dispositivo hasta que todos los lectores tengan la garantía de ver el nuevo bus nulo. Destruir dispositivos antes de que se anule el bus podría dar lugar a un uso posterior a la liberación, ya que los lectores esperan que los dispositivos en su referencia del bus sigan siendo válidos.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-29 CVE Reserved
- 2024-02-29 CVE Published
- 2024-03-01 EPSS Updated
- 2024-08-08 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (11)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/f65886606c2d3b562716de030706dfe1bea4ed5e | Vuln. Introduced | |
| https://git.kernel.org/stable/c/f0dfffce3f4ffd5f822568a4a6fb34c010e939d1 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/840e124f89a5127e7eb97ebf377f4b8ca745c070 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/40a023f681befd9b2862a3c16fb306a38b359ae5 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/19184bd06f488af62924ff1747614a8cb284ad63 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d | Vuln. Introduced | |
| https://git.kernel.org/stable/c/68c125324b5e1d1d22805653735442923d896a1d | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.9 < 5.10.37 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9 < 5.10.37" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.9 < 5.11.21 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9 < 5.11.21" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.9 < 5.12.4 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9 < 5.12.4" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.9 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.9 < 5.13" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.4.238 Search vendor "Linux" for product "Linux Kernel" and version "4.4.238" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.9.238 Search vendor "Linux" for product "Linux Kernel" and version "4.9.238" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.14.200 Search vendor "Linux" for product "Linux Kernel" and version "4.14.200" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.19.148 Search vendor "Linux" for product "Linux Kernel" and version "4.19.148" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.66 Search vendor "Linux" for product "Linux Kernel" and version "5.4.66" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.8.10 Search vendor "Linux" for product "Linux Kernel" and version "5.8.10" | en |
Affected
| ||||||